General Chemistry 1: Chemical Formulas

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All General Chemistry 1 Naming Compounds Balancing Chemical Equations Mole Calculations Chemical Formulas Stoichiometry Molarity Net Ionic Equations Redox Reactions Ideal Gas Law Enthalpy Quantum Theory Electron Configuration Lewis Formulas and Resonance States of Matter Solutions and Molality Dimensional Analysis

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Empirical Formula Problems

One of the compounds of iron and oxygen occurs naturally in the mineral magnetite. When a 2.447 g sample was analyzed it was found to have 1.771 g of Fe. Calculate the empirical formula of this compound.

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Percentage Composition

A sample of a liquid with a mass of 8.657 g was decomposed into its elements and gave 5.217 g of C, 0.9620 g of H and 2.478 g of O. What is the percentage composition of each element in this compound?

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Hydrate Formula

What is the formula for the following hydrate:

3.71 g Na $_2$ CO $_3$ , 6.29 g H $_2$ O

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